The visitors hit the front in the 16th minute when Flood broke clear of his markers before rounding Gary Rogers for a cool finish.
But Pat Buckley’s side had to withstand a spirited second-half fightback by Sligo who squared the match when Evan McMillan scored nine minutes from time.
SLIGO ROVERS: Rogers, Keane, Davoren, Peers, E McMillan, Cawley, Ndo, D McMillan, Lynch, Connelly, Elding.
Subs: Djilali for Ndo (67), Martin for Lynch (75).
ST PATRICK’S ATHLETIC: Clarke, O’Brien, Kenna, Price, Bolger, Byrne, McFaul, Bermingham, Forrester, Flood, Maher.
Subs: Kelly for Forrester (60), Gannon for Byrne (75), Fagan for Flood (86).
Referee: Paul Tuite, Dublin.
In The second of Cork City’s Cork Airport Friendly Series games takes place tonight, against Burnley at Turner’s Cross at 7pm. Tickets are priced at €13 for adults, €8 for juveniles and €5 for schoolchildren and senior citizens available from the club shop at Douglas Village Shopping Centre, online from Ticketmaster and will be available on the night outside Turner’s Cross.